US7125881B2 - Use of pyrimidine—or triazine—2 carbonitiles for treating diseases associated with cysteine prostease activity and novel pyrimidine-2-carbonitile derivatives - Google Patents

Use of pyrimidine—or triazine—2 carbonitiles for treating diseases associated with cysteine prostease activity and novel pyrimidine-2-carbonitile derivatives Download PDF

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US7125881B2
US7125881B2 US10/518,817 US51881704A US7125881B2 US 7125881 B2 US7125881 B2 US 7125881B2 US 51881704 A US51881704 A US 51881704A US 7125881 B2 US7125881 B2 US 7125881B2
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alkyl
carbonitrile
chlorophenyl
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US20050222152A1 (en
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Andrew Bailey
Garry Pairaudeau
Anil Patel
Stephen Thom
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AstraZeneca AB
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    • A61K31/505Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
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    • C07D251/18Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with hydrogen or carbon atoms directly attached to at least one ring carbon atom to only one ring carbon atom with nitrogen atoms directly attached to the two other ring carbon atoms, e.g. guanamines
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    • C07D401/04Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
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Definitions

  • the present invention relates to compounds and compositions for treating diseases associated with cysteine protease activity.
  • the compounds are reversible inhibitors of cysteine proteases S, K, F, L and B. Of particular interest are diseases associated with Cathepsin S.
  • this invention also discloses processes for the preparation of such inhibitors.
  • Cathepsin S is a member of the papain superfamily of cysteine proteases which also encompasses Cathepsins B, H, L, O and K. Cathepsin S plays a key role in the processing of invariant chain in MHC class II complexes allowing the complex to associate with antigenic peptides. MHC class II complexes are then transported to the surface of the cell for presentation to effector cells such as T cells. The process of antigen presentation is a fundamental step in initiation of the immune response. In this respect inhibitors of cathepsin S could be useful agents in the treatment of inflammation and immune disorders such as, but not limited to, asthma, rheumatoid arthritis, multiple sclerosis and Crohn's disease. Cathepsin S has also been implicated in a variety of other diseases involving extracellular proteolysis such as the development of emphysema in COPD through degradation of elastin and in Alzheimers disease.
  • Cathepsins notably K and L have been shown to degrade bone collagen and other bone matrix proteins. Inhibitors of these cysteine proteases would be expected to be useful in the treatment of diseases involving bone resorption such as osteoporosis.
  • the present invention therefore provides use of a compound of formula (I)
  • an alkyl or alkenyl group or an alkyl or alkenyl moiety in a substituent group may be linear or branched.
  • Aryl groups include phenyl and naphthyl.
  • Heteroaryl groups include 5- or 6-membered, 5,6- or 6,6-fused heterocyclic rings containing one or more heteroatoms selected from N, S, O. Examples include pyridine, pyrimidine, thiazole, oxazole, pyrazole, imidazole, furan, thiophene, quinoline, isoquinoline, benzimidazole, benzofuran, benzothiophene and indole.
  • Certain compounds of formula (I) are capable of existing in stereoisomeric forms. It will be understood that the invention encompasses all geometric and optical isomers of the compounds of formula (I) and mixtures thereof including racemates. Tautomers and mixtures thereof also form an aspect of the present invention.
  • X is CH, NHR 2 , OR 2 where R 2 is preferably H or C 1-6 alkyl.
  • R is a group Y(CH 2 ) p R 7 where p is 0 or 1 and Y is NR 8 where R 8 is hydrogen and R 7 is substituted phenyl.
  • R 7 is phenyl substituted by halogen, especially chloro. More preferably R 7 is phenyl substituted by chloro in the 4-position.
  • R 1 is a group NR 13 R 14 where R 13 and R 14 together with the nitrogen atom to which they are attached form a morpholine ring, piperidine or piperazine ring optionally substituted, or R 1 is a group NR 9 R 10 where R 10 is H or C 1-6 alkyl and R 9 is C 1-6 alkyl which can optionally contain one or more O, S or NR 4 groups where R 4 is hydrogen or C 1-6 alkyl.
  • R and R 1 are those of the examples exemplified herein.
  • Preferred compounds of the invention include:
  • the invention provides a compound of formula (I) as defined above but where X is CH, NHR 2 , OR 2 where R 2 is preferably H or C 1-6 alkyl.
  • X is CH, NHR 2 , OR 2 where R 2 is preferably H or C 1-6 alkyl.
  • R 2 is preferably H or C 1-6 alkyl.
  • the present invention further provides a process for the preparation of a compound of formula (I) which comprises
  • L1 and L2 may be displaced by R and R 1 respectively where R and R 1 are defined in formula (I) and L3 may be displaced by a cyanide salt.
  • the sequence of displacement of L1, L2 and L3 may be varied.
  • R 3 compounds of general formula (ID may be formed by treatment of compounds of general formula (III) and (IV) with phosphorous oxychloride at reflux.
  • R 19 is preferably C 1-6 alkyl or benzyl
  • a method for producing inhibition of a cysteine protease in a warm blooded animal, such as man, in need of such treatment which comprises administering to said animal an effective amount of a compound of the present invention, or a pharmaceutically acceptable salt thereof
  • the invention also provides a compound of the formula (I), or a pharmaceutically acceptable salt thereof, for use as a medicament; and the use of a compound of the formula (I) of the present invention, or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in the inhibition of a cysteine protease in a warm blooded animal, such as man.
  • the compounds of the invention are useful in the treatment of inflammation and immune disorders such as asthma, rheumatoid arthritis, COPD, multiple sclerosis, Crohn's disease, Alzheimers and pain, such as neuropathic pain.
  • the compounds of the invention are used to treat pain, in particular neuropathic pain.
  • the invention provides the use of a compound of the formula (I) of the present invention, or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in the inhibition of Cathepsin S in a warm blooded animal, such as man.
  • a compound of the formula (I) or a pharmaceutically acceptable salt thereof for the therapeutic treatment of mammals including humans, in particular in the inhibition of a cysteine protease, it is normally formulated in accordance with standard pharmaceutical practice as a pharmaceutical composition.
  • the present invention provides a pharmaceutical composition which comprises a compound of the formula (I) or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable diluent or carrier.
  • compositions of this invention may be administered in standard manner for the disease condition that it is desired to treat, for example by oral, rectal or parenteral administration.
  • the compounds of this invention may be formulated by means known in the art into the form of, for example, tablets, capsules, aqueous or oily solutions or suspensions, (lipid) emulsions, dispersible powders, suppositories, ointments, creams, drops and sterile injectable aqueous or oily solutions or suspensions.
  • a suitable pharmaceutical composition of this invention is one suitable for oral administration in unit dosage form, for example a tablet or capsule which contains between 100 mg and 1 g of the compound of this invention.
  • composition of the invention is one suitable for intravenous, subcutaneous or intramuscular injection.
  • Each patient may receive, for example, an intravenous, subcutaneous or intramuscular dose of 1 mgkg ⁇ 1 to 100 mgkg ⁇ 1 of the compound, preferably in the range of 5 mgkg ⁇ 1 to 20 mgkg ⁇ 1 of this invention, the composition being administered 1 to 4 times per day.
  • the intravenous, subcutaneous and intramuscular dose may be given by means of a bolus injection.
  • the intravenous dose may be given by continuous infusion over a period of time.
  • each patient will receive a daily oral dose which is approximately equivalent to the daily parenteral dose, the composition being administered 1 to 4 times per day.
  • Buffers such as polyethylene glycol, polypropylene glycol, glycerol or ethanol or complexing agents such as hydroxy-propyl ⁇ cyclodextrin may be used to aid formulation.
  • the above formulations may be obtained by conventional procedures well known in the pharmaceutical art.
  • the tablets (a)–(c) may be enteric coated by conventional means, for example to provide a coating of cellulose acetate phthalate.
  • Morpholine was added dropwise to stirred solution of trichlorotriazine (6.7 g), N,N-diisopropylethylamine (60.5 ml) in dichloromethane (50 ml) at ⁇ 78° C. The solid formed was filtered off, washed with water, dried to give a white solid (6.7 g).
  • 4-Phenoxypiperidine (0.15 g) was added to a solution of the product from step (i) (0.2 g), N,N-diisopropylethylamine (1.47 ml) in tetrahydrofuran and stirred at room temperature for 16 h.
  • the solvent was evaporated under reduced pressure and the residue purified by chromatography on silica eluting with ether/isohexane (1:2). Yield 0.3 g white solid.
  • the solid was dissolved in N,N-dimethylformamide (20 ml), sodium cyanide (0.1 g) added and heated at 90° C. for 32 h.
  • Examples 3–26 were prepared according to the methods of example 1 or 2 using the appropriate amines.
  • Morpholine (0.16 g) was added to a solution of the product from step (ii) (0.16 g) in iso-propylalcohol (4 ml) and stirred for 2 h at room temperature. The mixture was partitioned between ethyl acetate and aqueous sodium hydrogencarbonate solution, the organics separated, dried (MgSO4) and evaporated under reduced pressure. The residue was purified by chromatography on silica eluting with isohexane/ethyl acetate (1:1). Yield 0.09 g
  • Examples 28–42 were prepared according to the general method of example 27 using the appropriate amines or phenols
  • Morpholine (0.774 mg) was added to a solution of 5-chloro-2,4,6-trifluoropyrimidine (1.5 g), N,N-diisopropylethylamine (1.15 g) in 1,4-dioxane (30 ml) and stirred at room temperature for 16 h. The mixture was partitioned between ethyl acetate and water, the organic layer dried (MgSO4) and evaporated under reduced pressure. The residue was purified by chromatography on silica eluting with 8% ethyl acetate in isohexane. Yield 0.88 g
  • Example 53 was prepared according to the general method of example 52 using the appropriate amine
  • QFRET Technology Quenched Fluorescent Resonance Energy Transfer
  • Synthetic substrate 20 ⁇ M [final]Z-Val-Val-Arg-AMC in phosphate buffer were added to a 96 well black Optiplate.
  • the assay plates were pre-read for compound auto fluorescence on SpectraMax Gemini at 355 nM excitation and 460 nM emission.
  • 250 pM [final] rHuman Cathepsin S in phosphate buffer was added and incubated for 2 h at room temperature on the SpectraMax Gemini, taking readings every 20 min at 355 nM excitation and 460 nM emission.
  • Activity Based template (5PTB-8) used the auto fluorescent corrected data to calculate the percentage inhibition for each compound concentration using the relevent plate controls. This data was used to construct inhibition curves and pIC 50 estimated by non-linear regression using a 4 parameter logistic model.

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US10/518,817 2002-06-24 2003-06-23 Use of pyrimidine—or triazine—2 carbonitiles for treating diseases associated with cysteine prostease activity and novel pyrimidine-2-carbonitile derivatives Expired - Fee Related US7125881B2 (en)

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US7687625B2 (en) 2003-03-25 2010-03-30 Takeda Pharmaceutical Company Limited Dipeptidyl peptidase inhibitors
US7723344B2 (en) 2003-08-13 2010-05-25 Takeda San Diego, Inc. Dipeptidyl peptidase inhibitors
US7790734B2 (en) * 2003-09-08 2010-09-07 Takeda Pharmaceutical Company Limited Dipeptidyl peptidase inhibitors
US8173663B2 (en) 2004-03-15 2012-05-08 Takeda Pharmaceutical Company Limited Dipeptidyl peptidase inhibitors
US20090012059A1 (en) * 2004-03-15 2009-01-08 Jun Feng Dipeptidyl peptidase inhibitors
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US7872124B2 (en) 2004-12-21 2011-01-18 Takeda Pharmaceutical Company Limited Dipeptidyl peptidase inhibitors
US8906901B2 (en) 2005-09-14 2014-12-09 Takeda Pharmaceutical Company Limited Administration of dipeptidyl peptidase inhibitors
US8222411B2 (en) 2005-09-16 2012-07-17 Takeda Pharmaceutical Company Limited Dipeptidyl peptidase inhibitors
US20090306379A1 (en) * 2006-09-13 2009-12-10 Takeda Pharmaceutical Company Limited POLYMORPHS OF BENZOATE SALT OF 2-[[6-[(3r)-3-AMINO-1- PIPERIDINYL]-3,4-DIHYDRO-3- METHYL-2,4-DIOXO-1(2H)-PYRIMIDINYL]METHYL]-BENZONITRILE AND METHODS OF USE THEREFORE
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EP1532121B1 (en) 2007-02-14
SE0201976D0 (sv) 2002-06-24
AU2003243095A1 (en) 2004-01-06
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WO2004000819A1 (en) 2003-12-31

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